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A sulfonated Schiff base dimethyltin(IV) coordination polymer: synthesis, characterization and application as a catalyst for ultrasound- or microwave-assisted Baeyer–Villiger oxidation under solvent-free conditions

2016Journal article Restricted access
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dc.contributor.authorMartins, Luisa
dc.contributor.authorHAZRA, SUSANTA
dc.contributor.authorGuedes Da Silva, M. Fátima C.
dc.contributor.authorPombeiro, Armando
dc.date.accessioned2017-09-05T13:39:14Z
dc.date.available2017-09-05T13:39:14Z
dc.date.issued2016
dc.description.abstractThe synthesis and crystal structure of the new dimethyltin(IV) compound [SnMe2(HL)(CH3OH)]n$(0.5nCH3OH) (1) derived from the Schiff base 2-[(2,3-dihydroxyphenyl) methylideneamino]benzenesulfonic acid (H3L) are described. Despite having six potentially donating centres (one imine nitrogen, two phenoxo and three sulfonate oxygen atoms), the monoprotonated dianionic ligand (HL2) behaves as an O,O,O-tridentate chelator. Single crystal X-ray diffraction revealed that 1 is a 1D coordination polymer with every tin(IV) ion bound to two methyl groups, a methanol molecule, two Ophenoxo and one m-Osulfonate atom from HL2. The coordination polymer 1 was applied as a heterogeneous catalyst for the Baeyer–Villiger oxidation of ketones to esters orlactones, using aqueous hydrogen peroxide as oxidant, under ultrasound (US) or microwave (MW) irradiation and solvent- and additive-free conditions. Overall conversions up to 76/82, 98/93, 93/89, 91/94, 83/90, 68/62 and 81/87% under US/MW irradiations were obtained with 3,3-dimethyl-2-butanone, cyclopentanone, 2-methylcyclopentanone, cyclohexanone, 3-methylcyclohexanone, benzophenone and acetophenone, respectively. The catalyst can be recycled up to five cycles without losing appreciable activity.pt_PT
dc.description.sponsorshipUID/QUI/00100/2013
dc.description.sponsorshipPTDC/QEQERQ/1648/2014
dc.description.sponsorshipPTDC/QEQ-QIN/3967/2014
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMARTINS, L. M. D. R. S. [et al] - A sulfonated Schiff base dimethyltin(IV) coordination polymer: synthesis, characterization and application as a catalyst for ultrasound- or microwave-assisted Baeyer–Villiger oxidation under solvent-free conditions. RSC Advances. ISSN 2046-2069. Vol. 6, N. º 81, (2016), pp. 78225-78233pt_PT
dc.identifier.doi10.1039/c6ra14689apt_PT
dc.identifier.issn2046-2069
dc.identifier.urihttp://hdl.handle.net/10400.21/7365
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.titleA sulfonated Schiff base dimethyltin(IV) coordination polymer: synthesis, characterization and application as a catalyst for ultrasound- or microwave-assisted Baeyer–Villiger oxidation under solvent-free conditionspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage78233pt_PT
oaire.citation.issue81pt_PT
oaire.citation.startPage78225pt_PT
oaire.citation.titleRSC Advancespt_PT
oaire.citation.volume6pt_PT
person.familyNameMartins
person.familyNameHAZRA
person.familyNameGuedes da Silva
person.familyNamePombeiro
person.givenNameLuisa
person.givenNameSUSANTA
person.givenNameM. Fátima C.
person.givenNameArmando
person.identifier637885
person.identifier-5yoR4sAAAAJ&hl=en
person.identifier789079
person.identifier.ciencia-idE218-E297-A4EA
person.identifier.ciencia-id731B-4D79-E1FE
person.identifier.ciencia-id7619-8E8E-979A
person.identifier.ciencia-id8311-38FA-CEFB
person.identifier.orcid0000-0002-5403-9352
person.identifier.orcid0000-0002-8101-2016
person.identifier.orcid0000-0003-4836-2409
person.identifier.orcid0000-0001-8323-888X
person.identifier.ridG-6210-2011
person.identifier.ridH-8274-2012
person.identifier.ridI-5945-2012
person.identifier.scopus-author-id8650947800
person.identifier.scopus-author-id23481611800
person.identifier.scopus-author-id6701761571
person.identifier.scopus-author-id7006067269
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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